User manual for the Shuangjie JJ‑BF series electronic balances covering setup, operation, specifications and troubleshooting.
The JJ‑BF series electronic balances are fully automatic, internal‑calibration laboratory scales produced by Shuangjie. They feature high precision, temperature compensation, multiple unit conversion, data output via RS‑232 and a built‑in loading mechanism for standard weights.
The manual provides detailed instructions for installation, calibration, operation, data communication, settings, safety precautions, fault diagnosis and warranty information for all models in the series (JJ124BF, JJ224BF, JJ324BF, JJ223BF, JJ323BF, JJ523BF, JJ623BF, JJ1023BF). This manual is written in Chinese.
| Resolution | 0.1 mg (for 120‑620 g models) |
|---|---|
| Tare range | 0‑120 g (up to 1020 g models) |
| Calibration method | Fully automatic internal calibration |
| Operating temperature | 18‑23 °C (some models 15‑30 °C) |
| Operating humidity | 50‑70 %RH (some models 40‑80 %RH) |
| Weighing platform diameter | Ø90 mm (larger models Ø120 mm) |
| Dimensions (W×L×H) | 220 mm × 360 mm × 345 mm |
| Power supply | AC 220 V ± 10 % 50/60 Hz |
| Communication interface | RS‑232 (DB‑9) serial port |
Press and hold the CAL key; when the display shows “CAL INT”, release the key to start automatic internal calibration.